// Copyright 2007, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Author: wan@google.com (Zhanyong Wan)

// Google Mock - a framework for writing C++ mock classes.
//
// This file tests the function mocker classes.

#include "gmock/gmock-generated-function-mockers.h"

#if GTEST_OS_WINDOWS
// MSDN says the header file to be included for STDMETHOD is BaseTyps.h but
// we are getting compiler errors if we use basetyps.h, hence including
// objbase.h for definition of STDMETHOD.
#  include <objbase.h>
#endif // GTEST_OS_WINDOWS

#include <map>
#include <string>
#include "gmock/gmock.h"
#include "gtest/gtest.h"

// There is a bug in MSVC (fixed in VS 2008) that prevents creating a
// mock for a function with const arguments, so we don't test such
// cases for MSVC versions older than 2008.
#if !GTEST_OS_WINDOWS || (_MSC_VER >= 1500)
#  define GMOCK_ALLOWS_CONST_PARAM_FUNCTIONS
#endif // !GTEST_OS_WINDOWS || (_MSC_VER >= 1500)

namespace testing
{
namespace gmock_generated_function_mockers_test
{

using testing::_;
using testing::A;
using testing::An;
using testing::AnyNumber;
using testing::Const;
using testing::DoDefault;
using testing::Eq;
using testing::Lt;
using testing::MockFunction;
using testing::Ref;
using testing::Return;
using testing::ReturnRef;
using testing::TypedEq;
using testing::internal::string;

class FooInterface
{
public:
  virtual ~FooInterface() {}

  virtual void VoidReturning(int x) = 0;

  virtual int Nullary() = 0;
  virtual bool Unary(int x) = 0;
  virtual long Binary(short x, int y) = 0;                    // NOLINT
  virtual int Decimal(bool b, char c, short d, int e, long f, // NOLINT
                      float g, double h, unsigned i, char *j, const string &k)
      = 0;

  virtual bool TakesNonConstReference(int &n) = 0; // NOLINT
  virtual string TakesConstReference(const int &n) = 0;
#ifdef GMOCK_ALLOWS_CONST_PARAM_FUNCTIONS
  virtual bool TakesConst(const int x) = 0;
#endif // GMOCK_ALLOWS_CONST_PARAM_FUNCTIONS

  virtual int OverloadedOnArgumentNumber() = 0;
  virtual int OverloadedOnArgumentNumber(int n) = 0;

  virtual int OverloadedOnArgumentType(int n) = 0;
  virtual char OverloadedOnArgumentType(char c) = 0;

  virtual int OverloadedOnConstness() = 0;
  virtual char OverloadedOnConstness() const = 0;

  virtual int TypeWithHole(int (*func)()) = 0;
  virtual int TypeWithComma(const std::map<int, string> &a_map) = 0;

#if GTEST_OS_WINDOWS
  STDMETHOD_(int, CTNullary)() = 0;
  STDMETHOD_(bool, CTUnary)(int x) = 0;
  STDMETHOD_(int, CTDecimal)
  (bool b, char c, short d, int e, long f, // NOLINT
   float g, double h, unsigned i, char *j, const string &k)
      = 0;
  STDMETHOD_(char, CTConst)(int x) const = 0;
#endif // GTEST_OS_WINDOWS
};

// Const qualifiers on arguments were once (incorrectly) considered
// significant in determining whether two virtual functions had the same
// signature. This was fixed in Visual Studio 2008. However, the compiler
// still emits a warning that alerts about this change in behavior.
#ifdef _MSC_VER
#  pragma warning(push)
#  pragma warning(disable : 4373)
#endif
class MockFoo : public FooInterface
{
public:
  MockFoo() {}

  // Makes sure that a mock function parameter can be named.
  MOCK_METHOD1(VoidReturning, void(int n)); // NOLINT

  MOCK_METHOD0(Nullary, int()); // NOLINT

  // Makes sure that a mock function parameter can be unnamed.
  MOCK_METHOD1(Unary, bool(int));                                 // NOLINT
  MOCK_METHOD2(Binary, long(short, int));                         // NOLINT
  MOCK_METHOD10(Decimal, int(bool, char, short, int, long, float, // NOLINT
                             double, unsigned, char *, const string &str));

  MOCK_METHOD1(TakesNonConstReference, bool(int &)); // NOLINT
  MOCK_METHOD1(TakesConstReference, string(const int &));

#ifdef GMOCK_ALLOWS_CONST_PARAM_FUNCTIONS
  MOCK_METHOD1(TakesConst, bool(const int)); // NOLINT
#endif

  // Tests that the function return type can contain unprotected comma.
  MOCK_METHOD0(ReturnTypeWithComma, std::map<int, string>());
  MOCK_CONST_METHOD1(ReturnTypeWithComma, std::map<int, string>(int)); // NOLINT

  MOCK_METHOD0(OverloadedOnArgumentNumber, int());    // NOLINT
  MOCK_METHOD1(OverloadedOnArgumentNumber, int(int)); // NOLINT

  MOCK_METHOD1(OverloadedOnArgumentType, int(int));   // NOLINT
  MOCK_METHOD1(OverloadedOnArgumentType, char(char)); // NOLINT

  MOCK_METHOD0(OverloadedOnConstness, int());        // NOLINT
  MOCK_CONST_METHOD0(OverloadedOnConstness, char()); // NOLINT

  MOCK_METHOD1(TypeWithHole, int(int (*)()));                      // NOLINT
  MOCK_METHOD1(TypeWithComma, int(const std::map<int, string> &)); // NOLINT

#if GTEST_OS_WINDOWS
  MOCK_METHOD0_WITH_CALLTYPE(STDMETHODCALLTYPE, CTNullary, int());
  MOCK_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE, CTUnary, bool(int));
  MOCK_METHOD10_WITH_CALLTYPE(STDMETHODCALLTYPE, CTDecimal,
                              int(bool b, char c, short d, int e, long f,
                                  float g, double h, unsigned i, char *j,
                                  const string &k));
  MOCK_CONST_METHOD1_WITH_CALLTYPE(STDMETHODCALLTYPE, CTConst, char(int));

  // Tests that the function return type can contain unprotected comma.
  MOCK_METHOD0_WITH_CALLTYPE(STDMETHODCALLTYPE, CTReturnTypeWithComma,
                             std::map<int, string>());
#endif // GTEST_OS_WINDOWS

private:
  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockFoo);
};
#ifdef _MSC_VER
#  pragma warning(pop)
#endif

class FunctionMockerTest : public testing::Test
{
protected:
  FunctionMockerTest()
    : foo_(&mock_foo_)
  {
  }

  FooInterface *const foo_;
  MockFoo mock_foo_;
};

// Tests mocking a void-returning function.
TEST_F(FunctionMockerTest, MocksVoidFunction)
{
  EXPECT_CALL(mock_foo_, VoidReturning(Lt(100)));
  foo_->VoidReturning(0);
}

// Tests mocking a nullary function.
TEST_F(FunctionMockerTest, MocksNullaryFunction)
{
  EXPECT_CALL(mock_foo_, Nullary()).WillOnce(DoDefault()).WillOnce(Return(1));

  EXPECT_EQ(0, foo_->Nullary());
  EXPECT_EQ(1, foo_->Nullary());
}

// Tests mocking a unary function.
TEST_F(FunctionMockerTest, MocksUnaryFunction)
{
  EXPECT_CALL(mock_foo_, Unary(Eq(2))).Times(2).WillOnce(Return(true));

  EXPECT_TRUE(foo_->Unary(2));
  EXPECT_FALSE(foo_->Unary(2));
}

// Tests mocking a binary function.
TEST_F(FunctionMockerTest, MocksBinaryFunction)
{
  EXPECT_CALL(mock_foo_, Binary(2, _)).WillOnce(Return(3));

  EXPECT_EQ(3, foo_->Binary(2, 1));
}

// Tests mocking a decimal function.
TEST_F(FunctionMockerTest, MocksDecimalFunction)
{
  EXPECT_CALL(mock_foo_,
              Decimal(true, 'a', 0, 0, 1L, A<float>(), Lt(100), 5U, NULL, "hi"))
      .WillOnce(Return(5));

  EXPECT_EQ(5, foo_->Decimal(true, 'a', 0, 0, 1, 0, 0, 5, NULL, "hi"));
}

// Tests mocking a function that takes a non-const reference.
TEST_F(FunctionMockerTest, MocksFunctionWithNonConstReferenceArgument)
{
  int a = 0;
  EXPECT_CALL(mock_foo_, TakesNonConstReference(Ref(a))).WillOnce(Return(true));

  EXPECT_TRUE(foo_->TakesNonConstReference(a));
}

// Tests mocking a function that takes a const reference.
TEST_F(FunctionMockerTest, MocksFunctionWithConstReferenceArgument)
{
  int a = 0;
  EXPECT_CALL(mock_foo_, TakesConstReference(Ref(a))).WillOnce(Return("Hello"));

  EXPECT_EQ("Hello", foo_->TakesConstReference(a));
}

#ifdef GMOCK_ALLOWS_CONST_PARAM_FUNCTIONS
// Tests mocking a function that takes a const variable.
TEST_F(FunctionMockerTest, MocksFunctionWithConstArgument)
{
  EXPECT_CALL(mock_foo_, TakesConst(Lt(10))).WillOnce(DoDefault());

  EXPECT_FALSE(foo_->TakesConst(5));
}
#endif // GMOCK_ALLOWS_CONST_PARAM_FUNCTIONS

// Tests mocking functions overloaded on the number of arguments.
TEST_F(FunctionMockerTest, MocksFunctionsOverloadedOnArgumentNumber)
{
  EXPECT_CALL(mock_foo_, OverloadedOnArgumentNumber()).WillOnce(Return(1));
  EXPECT_CALL(mock_foo_, OverloadedOnArgumentNumber(_)).WillOnce(Return(2));

  EXPECT_EQ(2, foo_->OverloadedOnArgumentNumber(1));
  EXPECT_EQ(1, foo_->OverloadedOnArgumentNumber());
}

// Tests mocking functions overloaded on the types of argument.
TEST_F(FunctionMockerTest, MocksFunctionsOverloadedOnArgumentType)
{
  EXPECT_CALL(mock_foo_, OverloadedOnArgumentType(An<int>()))
      .WillOnce(Return(1));
  EXPECT_CALL(mock_foo_, OverloadedOnArgumentType(TypedEq<char>('a')))
      .WillOnce(Return('b'));

  EXPECT_EQ(1, foo_->OverloadedOnArgumentType(0));
  EXPECT_EQ('b', foo_->OverloadedOnArgumentType('a'));
}

// Tests mocking functions overloaded on the const-ness of this object.
TEST_F(FunctionMockerTest, MocksFunctionsOverloadedOnConstnessOfThis)
{
  EXPECT_CALL(mock_foo_, OverloadedOnConstness());
  EXPECT_CALL(Const(mock_foo_), OverloadedOnConstness()).WillOnce(Return('a'));

  EXPECT_EQ(0, foo_->OverloadedOnConstness());
  EXPECT_EQ('a', Const(*foo_).OverloadedOnConstness());
}

TEST_F(FunctionMockerTest, MocksReturnTypeWithComma)
{
  const std::map<int, string> a_map;
  EXPECT_CALL(mock_foo_, ReturnTypeWithComma()).WillOnce(Return(a_map));
  EXPECT_CALL(mock_foo_, ReturnTypeWithComma(42)).WillOnce(Return(a_map));

  EXPECT_EQ(a_map, mock_foo_.ReturnTypeWithComma());
  EXPECT_EQ(a_map, mock_foo_.ReturnTypeWithComma(42));
}

#if GTEST_OS_WINDOWS
// Tests mocking a nullary function with calltype.
TEST_F(FunctionMockerTest, MocksNullaryFunctionWithCallType)
{
  EXPECT_CALL(mock_foo_, CTNullary()).WillOnce(Return(-1)).WillOnce(Return(0));

  EXPECT_EQ(-1, foo_->CTNullary());
  EXPECT_EQ(0, foo_->CTNullary());
}

// Tests mocking a unary function with calltype.
TEST_F(FunctionMockerTest, MocksUnaryFunctionWithCallType)
{
  EXPECT_CALL(mock_foo_, CTUnary(Eq(2)))
      .Times(2)
      .WillOnce(Return(true))
      .WillOnce(Return(false));

  EXPECT_TRUE(foo_->CTUnary(2));
  EXPECT_FALSE(foo_->CTUnary(2));
}

// Tests mocking a decimal function with calltype.
TEST_F(FunctionMockerTest, MocksDecimalFunctionWithCallType)
{
  EXPECT_CALL(mock_foo_, CTDecimal(true, 'a', 0, 0, 1L, A<float>(), Lt(100), 5U,
                                   NULL, "hi"))
      .WillOnce(Return(10));

  EXPECT_EQ(10, foo_->CTDecimal(true, 'a', 0, 0, 1, 0, 0, 5, NULL, "hi"));
}

// Tests mocking functions overloaded on the const-ness of this object.
TEST_F(FunctionMockerTest, MocksFunctionsConstFunctionWithCallType)
{
  EXPECT_CALL(Const(mock_foo_), CTConst(_)).WillOnce(Return('a'));

  EXPECT_EQ('a', Const(*foo_).CTConst(0));
}

TEST_F(FunctionMockerTest, MocksReturnTypeWithCommaAndCallType)
{
  const std::map<int, string> a_map;
  EXPECT_CALL(mock_foo_, CTReturnTypeWithComma()).WillOnce(Return(a_map));

  EXPECT_EQ(a_map, mock_foo_.CTReturnTypeWithComma());
}

#endif // GTEST_OS_WINDOWS

class MockB
{
public:
  MockB() {}

  MOCK_METHOD0(DoB, void());

private:
  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockB);
};

// Tests that functions with no EXPECT_CALL() ruls can be called any
// number of times.
TEST(ExpectCallTest, UnmentionedFunctionCanBeCalledAnyNumberOfTimes)
{
  {
    MockB b;
  }

  {
    MockB b;
    b.DoB();
  }

  {
    MockB b;
    b.DoB();
    b.DoB();
  }
}

// Tests mocking template interfaces.

template<typename T>
class StackInterface
{
public:
  virtual ~StackInterface() {}

  // Template parameter appears in function parameter.
  virtual void Push(const T &value) = 0;
  virtual void Pop() = 0;
  virtual int GetSize() const = 0;
  // Template parameter appears in function return type.
  virtual const T &GetTop() const = 0;
};

template<typename T>
class MockStack : public StackInterface<T>
{
public:
  MockStack() {}

  MOCK_METHOD1_T(Push, void(const T &elem));
  MOCK_METHOD0_T(Pop, void());
  MOCK_CONST_METHOD0_T(GetSize, int()); // NOLINT
  MOCK_CONST_METHOD0_T(GetTop, const T &());

  // Tests that the function return type can contain unprotected comma.
  MOCK_METHOD0_T(ReturnTypeWithComma, std::map<int, int>());
  MOCK_CONST_METHOD1_T(ReturnTypeWithComma, std::map<int, int>(int)); // NOLINT

private:
  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockStack);
};

// Tests that template mock works.
TEST(TemplateMockTest, Works)
{
  MockStack<int> mock;

  EXPECT_CALL(mock, GetSize())
      .WillOnce(Return(0))
      .WillOnce(Return(1))
      .WillOnce(Return(0));
  EXPECT_CALL(mock, Push(_));
  int n = 5;
  EXPECT_CALL(mock, GetTop()).WillOnce(ReturnRef(n));
  EXPECT_CALL(mock, Pop()).Times(AnyNumber());

  EXPECT_EQ(0, mock.GetSize());
  mock.Push(5);
  EXPECT_EQ(1, mock.GetSize());
  EXPECT_EQ(5, mock.GetTop());
  mock.Pop();
  EXPECT_EQ(0, mock.GetSize());
}

TEST(TemplateMockTest, MethodWithCommaInReturnTypeWorks)
{
  MockStack<int> mock;

  const std::map<int, int> a_map;
  EXPECT_CALL(mock, ReturnTypeWithComma()).WillOnce(Return(a_map));
  EXPECT_CALL(mock, ReturnTypeWithComma(1)).WillOnce(Return(a_map));

  EXPECT_EQ(a_map, mock.ReturnTypeWithComma());
  EXPECT_EQ(a_map, mock.ReturnTypeWithComma(1));
}

#if GTEST_OS_WINDOWS
// Tests mocking template interfaces with calltype.

template<typename T>
class StackInterfaceWithCallType
{
public:
  virtual ~StackInterfaceWithCallType() {}

  // Template parameter appears in function parameter.
  STDMETHOD_(void, Push)(const T &value) = 0;
  STDMETHOD_(void, Pop)() = 0;
  STDMETHOD_(int, GetSize)() const = 0;
  // Template parameter appears in function return type.
  STDMETHOD_(const T &, GetTop)() const = 0;
};

template<typename T>
class MockStackWithCallType : public StackInterfaceWithCallType<T>
{
public:
  MockStackWithCallType() {}

  MOCK_METHOD1_T_WITH_CALLTYPE(STDMETHODCALLTYPE, Push, void(const T &elem));
  MOCK_METHOD0_T_WITH_CALLTYPE(STDMETHODCALLTYPE, Pop, void());
  MOCK_CONST_METHOD0_T_WITH_CALLTYPE(STDMETHODCALLTYPE, GetSize, int());
  MOCK_CONST_METHOD0_T_WITH_CALLTYPE(STDMETHODCALLTYPE, GetTop, const T &());

private:
  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockStackWithCallType);
};

// Tests that template mock with calltype works.
TEST(TemplateMockTestWithCallType, Works)
{
  MockStackWithCallType<int> mock;

  EXPECT_CALL(mock, GetSize())
      .WillOnce(Return(0))
      .WillOnce(Return(1))
      .WillOnce(Return(0));
  EXPECT_CALL(mock, Push(_));
  int n = 5;
  EXPECT_CALL(mock, GetTop()).WillOnce(ReturnRef(n));
  EXPECT_CALL(mock, Pop()).Times(AnyNumber());

  EXPECT_EQ(0, mock.GetSize());
  mock.Push(5);
  EXPECT_EQ(1, mock.GetSize());
  EXPECT_EQ(5, mock.GetTop());
  mock.Pop();
  EXPECT_EQ(0, mock.GetSize());
}
#endif // GTEST_OS_WINDOWS

#define MY_MOCK_METHODS1_                                                      \
  MOCK_METHOD0(Overloaded, void());                                            \
  MOCK_CONST_METHOD1(Overloaded, int(int n));                                  \
  MOCK_METHOD2(Overloaded, bool(bool f, int n))

class MockOverloadedOnArgNumber
{
public:
  MockOverloadedOnArgNumber() {}

  MY_MOCK_METHODS1_;

private:
  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockOverloadedOnArgNumber);
};

TEST(OverloadedMockMethodTest, CanOverloadOnArgNumberInMacroBody)
{
  MockOverloadedOnArgNumber mock;
  EXPECT_CALL(mock, Overloaded());
  EXPECT_CALL(mock, Overloaded(1)).WillOnce(Return(2));
  EXPECT_CALL(mock, Overloaded(true, 1)).WillOnce(Return(true));

  mock.Overloaded();
  EXPECT_EQ(2, mock.Overloaded(1));
  EXPECT_TRUE(mock.Overloaded(true, 1));
}

#define MY_MOCK_METHODS2_                                                      \
  MOCK_CONST_METHOD1(Overloaded, int(int n));                                  \
  MOCK_METHOD1(Overloaded, int(int n));

class MockOverloadedOnConstness
{
public:
  MockOverloadedOnConstness() {}

  MY_MOCK_METHODS2_;

private:
  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockOverloadedOnConstness);
};

TEST(OverloadedMockMethodTest, CanOverloadOnConstnessInMacroBody)
{
  MockOverloadedOnConstness mock;
  const MockOverloadedOnConstness *const_mock = &mock;
  EXPECT_CALL(mock, Overloaded(1)).WillOnce(Return(2));
  EXPECT_CALL(*const_mock, Overloaded(1)).WillOnce(Return(3));

  EXPECT_EQ(2, mock.Overloaded(1));
  EXPECT_EQ(3, const_mock->Overloaded(1));
}

TEST(MockFunctionTest, WorksForVoidNullary)
{
  MockFunction<void()> foo;
  EXPECT_CALL(foo, Call());
  foo.Call();
}

TEST(MockFunctionTest, WorksForNonVoidNullary)
{
  MockFunction<int()> foo;
  EXPECT_CALL(foo, Call()).WillOnce(Return(1)).WillOnce(Return(2));
  EXPECT_EQ(1, foo.Call());
  EXPECT_EQ(2, foo.Call());
}

TEST(MockFunctionTest, WorksForVoidUnary)
{
  MockFunction<void(int)> foo;
  EXPECT_CALL(foo, Call(1));
  foo.Call(1);
}

TEST(MockFunctionTest, WorksForNonVoidBinary)
{
  MockFunction<int(bool, int)> foo;
  EXPECT_CALL(foo, Call(false, 42)).WillOnce(Return(1)).WillOnce(Return(2));
  EXPECT_CALL(foo, Call(true, Ge(100))).WillOnce(Return(3));
  EXPECT_EQ(1, foo.Call(false, 42));
  EXPECT_EQ(2, foo.Call(false, 42));
  EXPECT_EQ(3, foo.Call(true, 120));
}

TEST(MockFunctionTest, WorksFor10Arguments)
{
  MockFunction<int(bool a0, char a1, int a2, int a3, int a4, int a5, int a6,
                   char a7, int a8, bool a9)>
      foo;
  EXPECT_CALL(foo, Call(_, 'a', _, _, _, _, _, _, _, _))
      .WillOnce(Return(1))
      .WillOnce(Return(2));
  EXPECT_EQ(1, foo.Call(false, 'a', 0, 0, 0, 0, 0, 'b', 0, true));
  EXPECT_EQ(2, foo.Call(true, 'a', 0, 0, 0, 0, 0, 'b', 1, false));
}

#if GTEST_HAS_STD_FUNCTION_
TEST(MockFunctionTest, AsStdFunction)
{
  MockFunction<int(int)> foo;
  auto call = [](const std::function<int(int)> &f, int i) { return f(i); };
  EXPECT_CALL(foo, Call(1)).WillOnce(Return(-1));
  EXPECT_CALL(foo, Call(2)).WillOnce(Return(-2));
  EXPECT_EQ(-1, call(foo.AsStdFunction(), 1));
  EXPECT_EQ(-2, call(foo.AsStdFunction(), 2));
}

TEST(MockFunctionTest, AsStdFunctionReturnsReference)
{
  MockFunction<int &()> foo;
  int value = 1;
  EXPECT_CALL(foo, Call()).WillOnce(ReturnRef(value));
  int &ref = foo.AsStdFunction()();
  EXPECT_EQ(1, ref);
  value = 2;
  EXPECT_EQ(2, ref);
}
#endif // GTEST_HAS_STD_FUNCTION_

} // namespace gmock_generated_function_mockers_test
} // namespace testing
